# 条件语句 if,else,elif
# info = input()
info = ""
if (info == "coucou") : 
    # print("您输入的内容为：" + info) 
    pass
elif (info == "999") :
    # print("您输入的是数字：" + str(info))
    pass
else:
    # print("无法处理你的输入！")
    pass

# 循环语句 for, while, break(跳出整个循环), continue(跳出本次循环), pass
for i in range(0, 3000):
    print("I love you 3000!")

dic = {0 : "这里是0", "陈" : "coucou", 99.9 : False}
for val in dic.values() :
    print(val)

j = 0
while (True):
    if (j % 3 != 0):
        j += 2
        continue

    print(j)
    j += 1
    if (j > 500):
        break


# 打印100以内所有质数：2,3,5,7,11,13,17,19 9
for num in range(2, 101):
    flag = True # 默认是质数，没有其他因数
    for factor in range(2, num // 2 + 1):
        if (num % factor == 0):
            flag = False # 已经不是质数了
            break
    if (flag):
        print(num)